Window Waterproofing | Bay Area

More stucco wall failures begin at windows than anywhere else. Every window is a hole in the water barrier, and it stays watertight only if the flashing, barrier, and stucco are integrated correctly — head flashing lapped under the barrier above, sill protection directing water out, and stucco returns sealed without trapping moisture.

Fogg Construction handles window installation and waterproofing as a single scope: setting or re-setting the window, building the flashing and moisture barrier around it, and patching the stucco to match the existing wall. When window replacement crews cut out stucco and leave the patch to "someone," that someone’s work determines whether the wall leaks. We’d rather it be ours.

Our window patching and restoration work follows the same discipline: remove the damaged stucco around the frame, inspect and reinforce the water barrier, and re-apply stucco that blends seamlessly with the facade.

What’s Included

Scope of the work.

New window installation

Windows set, flashed, and integrated into the wall’s moisture barrier in correct shingle-lap sequence.

Replacement window waterproofing

Flashing and barrier rebuilt around retrofit and new-construction-flange replacements — the step most window jobs skip.

Stucco cut-out & patch-back

Clean stucco removal for window work and seamless patch-back matched to the existing texture and color.

Leak repair at existing windows

Diagnosis and correction of windows that already leak: barrier repair, new flashing, and restored stucco returns.

Recent Work

Window Waterproofing in the field.

Click any image to see it full size.

Craftsman townhomes with window patching complete and finishes blended to match (after)

New stucco facade with clean trim lines around windows (after) — siding-to-stucco conversion

Window opening patched with fresh base coat stucco and masking on a craftsman townhome (during)

Moisture barrier paper lapped around window openings before stucco patching (during) — window waterproofing

Venetian plaster walls and marble tile in a bathroom with a valley view — interior plaster finish

Townhome with original vertical wood siding before its stucco conversion (before)

Where We Work

Window Waterproofing across the Bay Area.

San Francisco View area → Marin County View area → Sonoma County View area → Alameda View area →

★★★★★

“They were fantastic! The owner came out himself to bid the job, threw in some stucco patchwork that was needed outside of the immediate area to be fixed. The crew was on time, worked quickly, and didn’t leave any debris behind (cleaned up the area perfectly). Not the cheapest, not the most expensive either, but the expertise and skill was evident and I couldn’t be happier. I highly recommend Fogg.”

Ana S. · Petaluma, CA

FAQ

Frequently asked.

Why do stucco walls so often leak at windows?

Because a window interrupts the wall’s water barrier, and the penalty for incorrect flashing is invisible — water enters behind the stucco and damages framing long before anything shows. Correct shingle-style integration of flashing, barrier, and stucco is what keeps the assembly dry.

My window installer says the stucco patch isn’t their job. Can you handle it?

Yes — that hand-off is exactly where leaks are born. We patch stucco around new windows with the barrier and flashing rebuilt correctly, and we match the existing texture so the patch disappears.

Do you find damage when you open up around windows?

Sometimes — that’s the point of inspecting while the wall is open. If the barrier or framing shows water damage, we document it and correct it before closing up, so you’re not sealing a problem inside the wall.

Can you waterproof windows without replacing them?

Often, yes. If the window unit itself is sound, we can remove the stucco at the perimeter, rebuild the flashing and barrier, and restore the stucco — solving the leak while keeping the existing window.

Will the patch around my new window be visible?

Texture matching is one of our specialties. The patch is finished to match the surrounding wall’s texture, and where color uniformity calls for it, we’ll recommend a fog coat to blend the elevation.

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